Download Test 3

REGENTS & HONORS CHEMISTRY
TEST #3
Key Terms & Important Stuff to Know
Energy & the Phase Changes to Matter
Basic Math & Methods
Measurement & Significant Figures
Calculating with Significant Figures
Percent Error
S.I. Units & Metric Prefixes
Exponential Form
Energy
Forms of Energy
Law of Conservation of Energy
Potential vs. Kinetic Energy
Heat : involves transfer of energy
Flows from high temp. to low temp.
Describe changes to motion of particles
when heat added or taken away
Temperature - measure of average KE
Conversions between Kelvin & Celsius
Absolute zero (0 Kelvin)
Endothermic vs. Exothermic Changes
Matter
Three Phases of Matter and Their Properties
Solids, Liquids, Gases
Phase Changes of Matter – name and identify
Melting (fusion), Vaporization,
Condensation, Freezing (solidification)
Sublimation & Deposition
HONORS ONLY
Heat Gain = Heat Lost Problems
Heat Problems with Compounds other than water
Multi-step Heat Summation Problems
Intermolecular Forces
Bonds between molecules
Forces must be overcome to change phase
Dipole-Dipole
Between polar covalent molecules
Hydrogen bonding
Between polar molecules where hydrogen is
bonded to a very E.N. atom (F, O, N)
Strongest intermolecular force
Creates higher MP/BP temps
Van der Waals Forces (the weak force)
Attraction between non-polar molecules
Weakest attractive force
Only felt when molecules close together
Substances have lowest MP/BP
Strongest when more e- in molecule
Heating & Cooling Curves (Change of Phase Diagrams)
Where does PE change? Where does KE change?
Where are the phase changes?
Where is it solid liquid, gas?
The Heat Equations
Measuring Heat Energy when temp. changes
Q = mc∆T
Measuring Heat Energy During Phase Changes
Q = mHv
Q = mHf
TEXTBOOK: (Solutions not on test!)
Honors: Chap. 5, 11
Regents: Chap. 10, 11, 17
UPCO: Chap. 5, Appendix A